I dont have any necklaces but...
I had both my ears pierced over a year ago by my stylist. (who incedentally made me feel good about CDing,and tried to get me to dress all the time, Love that man.)
And I ALWAYS have something in 'em. Right now? Austrian Crystal. 1ct each. Huge. But than again, in this day and at my age, no one really cares. I go out with full eye makeup all the time. I get hit on by alot of women when I do. Gives me that 'Billy Idol Look'.